package chapter05.E16;

import java.util.Random;

public class E16 {
    public static void main(String[] args) {
        //数学方法类 Math
        System.out.println(Math.random());
        System.out.println(Math.PI);
        //随机类 Random
        Random r = new Random();
        for (int i = 0; i < 10; i++){
            System.out.println(r.nextInt(54));
        }
        //
        Integer num = 1;
        Character c ='a';
        int d = num;
    }
}
